Angel of Attack wrote on Jun 15^th, 2021 at 2:08pm:

According to FCTM, 3~4 is the range for a normal VREF+5 approach.

Actually the highest value quoted in the FCTM is 3.2 for the -300 with flap 30, with 1.7 with flap 40. If you want to match these values as closely as possible, you can try lowering the scalar figure I mentioned by 0.05 at a time.

Cheers